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CVE-2019-10201

24
FAUCET Score

CVE-2019-10201 describes a critical vulnerability in Keycloak's SAML broker, affecting versions up to 6.0.1, as well as Red Hat Single Sign-On. The flaw allows attackers to bypass signature verification in SAML responses by removing the signature section, enabling them to modify messages and impersonate other users to gain unauthorized access to sensitive information. With a CVSS score of 8.1 (HIGH), this vulnerability has a network attack vector and low attack complexity, leading to high impacts on confidentiality and integrity. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 6.0.1CPE matchmatch criteria
cpe:2.3:a:redhat:keycloak:*:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:a:redhat:single_sign-on:7.0:*:*:*:*:*:*:*
7.3.3CPE matchmatch criteria
cpe:2.3:a:redhat:single_sign-on:7.3.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.1HIGH

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
5.2
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.71%
Probability of exploitation in next 30 days
EPSS Percentile
49.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0071 is in the 42nd percentile among its peer group of 17,844 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (8)

mavenpatch availablevia ghsa
Product: org.keycloak:keycloak-coreFixed in: 7.0.0
redhatpatch availablevia redhat_api
Product: Red Hat Runtimes Spring Boot 2.1.12Fixed in: keycloak
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Single Sign-On 7.3.3 zip
View patch
redhatpatch availablevia redhat_api
Product: Text-Only RHOAR
View patch
redhatworkaround availablevia nvd_reference
View patch
redhatno patchvia redhat_api
Product: Red Hat OpenShift Application RuntimesFixed in: keycloak
redhatno patchvia redhat_api
Product: Red Hat Single Sign-On 7Fixed in: rh-sso7-keycloak
redhatend of lifevia redhat_api
Product: Red Hat Fuse 7Fixed in: keycloak

Vendor Advisories (2)

mavenGHSA-4fgq-gq9g-3rw7medium

Improper Verification of Cryptographic Signature in keycloak

Sep 23, 2019
redhatCVE-2019-10201Important

keycloak: SAML broker does not check existence of signature on document allowing any user impersonation

Aug 13, 2019

References

bugzilla.redhat.com / show_bug.cgi
Issue TrackingMitigationVendor Advisory